Komplett guide til konvertering av skostørrelser
Table of Contents
- Quick Summary
- The Global Standard: History and Context
- Why Norway’s System Differs
- The Anatomy of a Perfect Fit
- Pro Tip: The "Thumb Test"
- Regional Sizing Nuances & Conversions
- Brand Authority: How the Giants Fit
- Width & Volume: Beyond the Number
- Troubleshooting Common Sizing Errors
- Expert Verdict: Buying Online with Confidence
Quick Summary
- Global sizing varies: Shoe size systems differ by region (EU, US, UK, JP), requiring precise conversions.
- Measure twice, buy once: Foot length, width, and arch height all impact fit—never rely on size alone.
- Brands fit differently: Nike runs narrow, New Balance offers wide options, and Adidas often fits half a size larger.
- Width matters as much as length: A "D" width in the US is standard, but European brands rarely label widths.
The Global Standard: History and Context
Footwear sizing traces back to regional trade practices. The Paris Point (EU) system, developed in the 19th century, uses a ⅔ cm increment per size. Meanwhile, the UK’s Barleycorn system (1/3 inch per size) and the US’s adaptation (with slight variations) created enduring discrepancies. Japan’s centimeter-based sizing (JP) adds another layer—making conversions essential for international shoppers.
Why Norway’s System Differs
Norway primarily uses the EU standard, but local brands may adjust lasts (shoe molds) for Scandinavian foot shapes—typically narrower heels and higher insteps compared to US or Asian fits. For example, a EU 42 in a Norwegian brand like Ecco might feel roomier in the toe box than an Italian Salvatore Ferragamo equivalent.
The Anatomy of a Perfect Fit
A precise fit requires measuring three dimensions:
- Length: Stand on paper, mark heel and longest toe, measure in cm or inches.
- Width: Wrap a tape measure around the ball of your foot; compare to brand-specific charts.
- Volume: High arches or flat feet may need adjustable lacing or insoles.
Pro Tip: The "Thumb Test"
Leave a thumb’s width (about 1–1.5 cm) between your longest toe and the shoe’s end. For winter boots, account for thicker socks.
Regional Sizing Nuances & Conversions
Use this formula for manual conversions:
- EU to US: EU size × 1.5 + 2 = US men’s (e.g., 40 × 1.5 + 2 = US 10). Women subtract 1–1.5 sizes.
- UK to EU: UK size + 33 = EU (but UK sizes start counting at 0, unlike US).
- JP to EU: JP cm × 1.5 ≈ EU (e.g., 26 cm × 1.5 = EU 39).
| EU | US Men | US Women | UK | JP (cm) |
|---|---|---|---|---|
| 39 | 7 | 8.5 | 6 | 25 |
| 42 | 9 | 10.5 | 8 | 27 |
| 45 | 11.5 | 13 | 11 | 29 |
Brand Authority: How the Giants Fit
Nike: Runs narrow; consider half a size up for wide feet. Air Jordans fit snug in the toe box.
Adidas: TTS (true to size) for most, but Ultraboosts often need +0.5 due to primeknit.
New Balance: Wide options (2E, 4E) available; their "990" series has a roomier toe.
Puma: Similar to Adidas but with a shorter toe; narrow-footed users size down.
Reebok: Classic Leather fits TTS; Club C runs slightly large.
Width & Volume: Beyond the Number
US widths range from B (narrow) to 4E (extra-wide), while EU brands rarely label widths—forcing shoppers to rely on reviews. For high-volume feet, look for:
- Adjustable straps or laces (e.g., Hoka Bondi for runners).
- Stretchy materials (Flyknit, Primeknit).
- Brands like Altra with "foot-shaped" toe boxes.
Troubleshooting Common Sizing Errors
Problem: "My EU 43 sneakers feel too tight."
Solution: Check if the brand uses Italian sizing (often ½ size smaller than EU standard).
Problem: "My heels slip in boots."
Solution: Try a thicker insole or a Dr. Scholl’s heel grip—your foot volume may be low for the last.
Expert Verdict: Buying Online with Confidence
- Measure feet at end of day (feet swell).
- Compare your measurements to the brand’s size chart (never assume).
- Read reviews for mentions of "runs large/small" or width issues.
- Prioritize retailers with free returns (e.g., Zappos, ASOS).
Final note: For custom orthotics, size up ½ to accommodate the extra volume.